#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
	int year, month;
	while ((scanf("%d %d", &year, &month)) != EOF)
	{
		switch (month)
		{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			printf("31\n");
			break;
		case 4:
		case 6:
		case 9:
		case 11:
			printf("30\n");
			break;
		case 2:
			if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
				printf("29\n");
			else
				printf("28\n");
		};
	}
	return 0;
}